1. Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics; Collaborative Innovation Center for Optoelectronic Science and Technology; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 P. R. China
2. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 P. R. China
3. College of Chemistry and Environmental Engineering; Shenzhen University; Shenzhen 518060 P. R. China
4. Shenzhen Key Laboratory of Laser Engineering; College of Optoelectronic Engineering; Shenzhen University; Shenzhen 518060 P. R. China
5. College of Materials Science and Engineering; Shenzhen University and Shenzhen Key Laboratory of Special Functional Materials; Shenzhen 518060 P. R. China
6. School of Science and Engineering; The Chinese University of Hong Kong; Shenzhen Longxiang Ave 2001 Shenzhen Guangdong 518172 P. R. China